Disk typewriter



n JANKOWER DISK TYPEWRITER.

APPLICATION FILED 1,337,318.

DEC.20,1917. R ENEWED MAR. 13,1920.

Patented Apr. 20, 1920.

2 SHEETSSHEET ln. JANKOWER. DISK TYPEWHITER. APPLICATION FILED DEC-20, 1917. RENEWED MAR. 13, 1.920-

1,337,318, A I Patented Apr. 20,1920

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

DAVID JANKOVER, OF NEW YORK, N. Y.

DISK TYPEWRITER.

Application filed December 20, 1917, Serial No. 208,158.

To all whom it may concern:

Be it known that 1, DAVID JANKO'WER, a citizen of the United States, and resident of New York city, in the county of New York and State or New York, have invented certain new and useful Improvements in Disk Typewriters, of which the following is a specification.

The object of this invention is to produce an instrument, that although slower in action than that of the regular keyboard type is simple in construction and more rapid in operation than those of the disk type now in use.

The increase in speed is obtained by such a combination of the several parts that all the motions of printing are controlled at one central point from which the hand of the operator is not removed until the necessary number of lines have been printed.

There are four separate motions produced by the hand of the operator; a rotation of the type carrying disk; the side movement of the paper after a character has been printed, and previous to the printing of the following one; the printing of the different characters; and, the spacing between the complete words.

There is no time wasted through having to move the hand continuously from one part of the instrument to another, as has to be done in other instruments of the disk type and a reference to the accompanying drawings will clearly show how the results above described are accomplished.

Figure 1, is a plan view; Fig. 2, a crosssection through dotted lines Z, Z, of Fig. 1; Fi 3, a longitudinal cross-section of part ofTig. 1; and Fig. 4, is a perspective view of the paper carrier shown on a smaller scale and without shaft attachment. Similar numerals refer to similar parts throughout the different views.

A rotatable typecarrying disk 1, provided with characters on its upper surface and corresponding printing type underneath, is rigidly secured to a hollow handle 2, which has a plunger 3, passing through its center. TVhen it is desired to bring a letter into position for printing, say letter A, the said disk l, by means of handle 2, is rotated until the letter A, is brought to spring 7 (indicated by arrow in Fig. 1), where it is held until an impression has been taken, but as Specification of Letters Patent.

Renewed March 13, 1920. Serial No. 365,681.

the impression takes places at the lower part of the said disk 1 immediately over the platen 18, (see F 1g. 2) it is necessary to have the type-character A placed under neath the letter \V, as 'shown in Figs. 1 and 2.

The platen 18 is placed at such an angle as will correspond with the are through which the lower part of disk 1 passes, when pressed downward to print the letters on the paper 27 (covered with a carbon sheet) which paper after leaving the platen is, by means of rolls 14, passed over curved plate 29 and then through elongated slot 28 in paper-carrier 8. The handle 2, secured to disk 1, is pivoted to carrier 4 which is hinged to supports 5. The said carrier 4 is held in its normal, or horizontal, position by spring 7 and the paper-carrier 8 (having teeth 26 on the edge of its turned up section) is kept in position by guides 15 and 16 which are secured to base 6 by screws 17.

The plunger 3 has a ring 19 secured to its upper part and passes through guide ring 20 which is secured to handle 2 by screw 21, a spiral spring 23 resting between the two rings. An arm 31 secured to the hinged carrier 4 and projecting into vertical slot 32 cut in one side of plunger 3, serves to prevent the said plunger 3 from turning when the handle 2 is rotated, the washer 24 keeping disk 1 out of contact with carrier 4. The shaft 9 is rotated by either hand-wheel 11 or 12 and carries a toothed-wheel 12 which, by means of spring 13 determines the width of spaces between lines of printing.

In operation, after the paper and carbon sheet have been inserted between rolls 14, the handle 2 is held between the thumb and middle finger of the right hand and the forefinger is used to operate the plunger 3.

The first action that takes place, when the handle 2 is pressed downward, is the contacting of pawl 22 with the teeth 26 of paper-carrier 8, and, by flattening out, moving the said paper-carrier 8 from right to left the distance of one tooth. As the downward movement is continued one of the type-characters 30, on the under surface of disk 1 is brought into contact with paper 27, on which an impression of the letter is made. When the pressure on handle 2 is released disk 1 resumes its normal position by means of spring 7 secured to supports 5. After a word has been printed, the space following is made by pressing downward with the forefinger the plunger 3, which, by means of spiral spring 23, regains its normal position when the finger pressure is released. Although there is a hand wheel at each end of shaft 9, the one to the right is merely for convenience when inserting a fresh sheet of paper between rolls 14.

It can be understood from the above de scription that all of the motions necessary for printin are made from one central vpoint (the liandle 2) from which the hand is never moved until all the printing that has to be done on a sheet of paper is finished. The moving of the paper forward after a line is finished is performed by flurraing the hand wheel 11, with the left Having described my invention, what I desire to claim as new and novel is:

A typewriter with a hollow handle secured to and passing through a type-carrying disk, and rotatably secured to a hinged carrier; the said hollow handle being arranged to partake of both a circular and a downward motion, and having within its center a plunger with a pawl at its lower end, the said plunger being arranged to partake of only a downward motion and the pawl at its lower end being arranged to contact at intervals with teeth forming part of a paper carrier.

Si ned at New York city, in the county of N ew York and State of New York, this the 17th day of December, A. D. 1917.

DAVID JANKOWER.

Witnesses:

J. HART ROBERTSON, Gno. EMRICH. 

